Typical Application

Description

The SY21266 develops a high efficiency synchronous
step-down DC/DC regulator capable of delivering 16A current. The device integrates
main switch and synchronous switch with very low RDS(ON) to minimize
the conduction loss. The SY21266 operate over a wide input voltage range from 4V
to 18V.

The device
adopts the instant PWM architecture to achieve fast transient responses for
high step down applications and high efficiency at light loads. In addition, it
operates at pseudo-constant frequency of 500kHz under continuous conduction
mode to minimize the size of inductor and capacitor.